General Gyozen is among the human council on Monster Island when the Meteors strike. When the council gathers, he suggests using the Atoragon to fight the monsters, but his idea is dismissed by the rest of the council. Instead, he then commands Doctor Shiragami to experiment with G-Cells, which inadvertently results in the creation of a second Biollante. Later, he takes the Atoragon for himself, and pilots it to attack the monsters in various locations, before finally facing off against the player's monster in Osaka. He is ultimately killed after the Atoragon explodes.